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Radio frequency impedance matching for SAW devices on zinc oxide and lithium niobate

Kooij, D. (2018) Radio frequency impedance matching for SAW devices on zinc oxide and lithium niobate.

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Abstract:Finite element methods were used to obtain the electromechanical coupling factor and impedance of interdigital transducers on ZnO/Si multilayers & singe crystal 128 degree XY rotated X directed LiNbO3. The impedance was shown to be lower than expected using FEM simulations, indicating a possible impedance mismatch of the IDT with the peripheral circuit of the measurement instrument. Possible solutions were investigated, such as reducing the number of IDT finger pairs, providing a better match in the radio frequency regime. Furthermore, electrode loading of the substrate has been identified as a cause of unwanted reflections in surface acoustic wave devices, and possible mitigation strategies are discussed.
Item Type:Essay (Master)
Clients:
University of Twente., Enschede, The Netherlands
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:51 materials science, 53 electrotechnology
Programme:Applied Physics MSc (60436)
Link to this item:http://purl.utwente.nl/essays/76381
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